All linguistic research has the potential to reproduce or challenge racial notions.

—Linguistic Society of America Statement on Race (2019)

The LSA Statement on Race stems from a larger conversation around undertheorized treatment of race and ethnicity in linguistics research and practice. In this commentary, we define racial identity and ethnicity and explain their relevance for linguistic research. We discuss considerations that linguistic researchers should take prior to research, during study design, and following research, and we offer specific recommendations when soliciting or using race and ethnicity data. These recommendations aim to help researchers avoid social harm, ensure ethical compliance and research integrity, and improve descriptive accuracy, especially for undersampled groups, by balancing research transparency with generalizability. We consider issues germane to collecting self-disclosures of ethnicity and racial identity in a range of study types spanning several subfields of linguistics. We give concrete examples of questions that may arise in planning studies in computational and corpus-based linguistics, formal linguistics, experimental linguistics, and qualitative linguistics. We speak to ethical considerations, including the importance of using locally constructed labels, analyst positionality, and respect for communities. Our goals are to provide linguistic researchers with a firmer basis for conceptualizing racial identity and ethnicity particularly as pertains to linguistics, and to supply a guide that aids linguists in reflecting on their own study design, positionality, and responsibility to participants and communities.